INFORMATION PROCESSING SYSTEM, STORAGE UNIT, AND STORAGE DEVICE

WIPO Patent Application WO/2016/194095

A1

The purpose of the present invention is to increase the speed of a write process involving a parity update. The information processing system according to the present invention is provided with a plurality of storage devices which form a RAID group, are connected to a single bus, and communicate with each other. Each of the plurality of storage devices has a device controller and a storage medium for storing data. The plurality of storage devices include a first storage device storing old data and a second storage device storing an old parity corresponding to the old data. The first device controller of the first storage device generates an intermediate parity on the basis of the old data and new data which is to replace the old data, specifies the second storage device, which stores the old parity corresponding to the old data, and transmits the intermediate parity to the second storage device. The second device controller of the second storage device generates a new parity on the basis of the intermediate parity and the old parity.

NOMURA SHIMPEI (JP)
SUZUKI AKIFUMI (JP)
OKADA MITSUHIRO (JP)
MORISHITA SATOSHI (JP)

PCT/JP2015/065719

December 08, 2016

June 01, 2015

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HITACHI LTD (JP)

G06F3/06

JPH07261946A	1995-10-13
JP2014203233A	2014-10-27
JPH1074129A	1998-03-17
JP2015515033A	2015-05-21
JP2012519319A	2012-08-23
JP2007323224A	2007-12-13
JP2005044147A	2005-02-17

INOUE Manabu et al. (JP)
Manabu Inoue (JP)

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